Resistance Calculator

Length of the Wire:
Wire Cross Area:
Resistivity:
Resistance:



Resistance formula is:
  R = ρL/A

Where:

  ρ: Resistivity constant of the material, in Ω.m
  L: Length of the wire, in meter
  A: Cross sectional area of the wire, in m^2
  R: Resistance, in ohms (Ω)


Metal Resistivity Table
Metal
Resistivity (Ω . m) at 20 °C
Temperature coefficient [K-1]
Silver
1.59 × 10-8
0.0038
Copper
1.68 × 10-8
0.0039
Gold
2.44 × 10-8
0.0034
Aluminium
2.82 × 10-8
0.0039
Calcium
3.36 × 10-8
Tungsten
5.60 × 10-8
0.0045
Zinc
5.90 × 10-8
0.0037
Nickel
6.99 × 10-8
0.006
Iron
1.0 × 10-7
0.005
Platinum
1.06 × 10-7
0.00392
Tin
1.09 × 10-7
0.0045
Lead
2.2 × 10-7
0.0039
Manganin
4.82 × 10-7
0.000002
Constantan
4.9 × 10-7
0.000008
Mercury
9.8 × 10-7
0.0009
Nichrome
1.10 × 10-6
0.0004
Carbon
3.5 × 10-5
-0.0005
Germanium
4.6 × 10-1
-0.048
Silicon
6.40 × 102
-0.075
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